IQ and health: More discomfort for the Left
The Left hate IQ because it conflicts with their crazy "all men are equal" gospel. So they never give up hope of discrediting the whole concept. They have tried all sorts of arguments but the phenomenon is so robust and so pervasive that it has easily survived all the assaults aimed at it. It cannot be explained away.
But the unending stream of scientific findings showing how important IQ is to one's life chances has now mostly driven Leftists back to their most basic defence-mechanism: Denial. They just refuse to think or talk about it. They act as it doesn't exist -- with results that range from the hilarious to the disastrous.
For those of us who think reality is important, however, the recent report below should be of interest. The basic finding -- that high IQ people are healthier -- actually dates back to the 1920s but it is nice to see current research coming to the same conclusion. That's the pesky thing about IQ: Careful research into it always leads to the same conclusion
The findings below in fact support something I have been saying for a long time: That high IQ is an index of general biological fitness. The brain is just one of the body's organs and if it is functioning well, it is likely that the rest of the body is functioning well too. As a great Rabbi once said: "To him that hath, more will be given him" (Matthew 13:12). Jesus was not an egalitarian
Clever people are more likely to be healthier than those with a lower IQ due to a genetic link between how our bodies manage diseases and intelligence.
Researchers from Scotland analysed data from around 100,000 people held in the UK Biobank.
They compared each person's mental test data with their genome and found that traits linked to disease and thinking skills shared the same genetic influences.
In particular, the international team of scientists led by the University of Edinburgh found 'significant negative genetic correlations' between a person's education and verbal-numerical reasoning skills and Alzheimer's disease, coronary artery disease and strokes.
In other words, well-educated people who excel at problem solving are less likely to contract the conditions.
Clever people were also less likely to be overweight. [I like that one]
The team found there was a negative genetic correlation between body mass index and verbal-numerical reasoning, while a greater risk of high blood pressure was associated with lower education.
The researchers explained: 'Our results provide comprehensive new findings on the overlaps between cognitive ability levels, genetic bases for health-related characteristics such as height and blood pressure, and physical and psychiatric disorders even in mostly healthy, non-diagnosed individuals.
'They make important steps toward understanding the specific patterns of overlap between biological influences on health and their consequences for key cognitive abilities.
'For example, some of the association between educational attainment - often used as a social background indicator - and health appears to have a genetic [cause].'
However, the team added: 'It has not escaped our notice that there are multiple possible interpretations of these genetic correlations.
The results of the latest Edinburgh-based study build on previous research that found 95% of the link between intelligence and life expectancy is genetic.
Using a study on twins, experts from the London School of Economics found brighter twins tend to live longer and noted the pattern was much more pronounced in fraternal - non identical - twins, than identical pairs.
By looking at both fraternal twins - who only share half their twin's DNA - with identical twins, researchers were also able to distinguish between genetic effects and environmental factors, including housing, schooling and childhood nutrition.
'Not only might particular genes contribute both to cognitive and health-related traits, but genetic variants relating to health conditions could have indirect effects on cognitive ability and vice versa, [on] lifestyle choices.'
As an example, poorly educated people may be less likely to make informed choices about what they eat and how much they drink.
The study is not all good news for intelligent people, though.
The team did find that the genetic variants associated with obtaining a degree were also related to a higher genetic risk of schizophrenia, bipolar disorder and autism.
Edinburgh University Professor Ian Deary, who led the research, said the study could help in understanding some of the links between low levels of cognitive function and poor health.
Psychologist Saskia Hagenaars, who worked on the research, added: 'The study supports an existing theory which says that those with better overall health are likely to have higher levels of intelligence.'
The UK Biobank, launched in 2007, is a major long-term investigation into the respective contributions of genetic predisposition and environmental exposure in the development of disease.
The findings are published in the journal Molecular Psychiatry.